题目内容
把下列各分数约分.
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考点:约分和通分
专题:运算顺序及法则
分析:须先找出分子、分母的最大公约数,然后将分子、分母分别除以最大公约数,得出最简分数.
解答:
解:
=
=
;
=
=
;
=
=
;
=
=
;
=
=
;
=
=
;
=
=
;
=
=
=1
;
=
=
;
=
=
;
=
=
;
=
=
;
=
=
;
=
=
.
| 6 |
| 18 |
| 6÷6 |
| 18÷6 |
| 1 |
| 3 |
| 15 |
| 45 |
| 15÷15 |
| 45÷15 |
| 1 |
| 3 |
| 13 |
| 39 |
| 13÷13 |
| 39÷13 |
| 1 |
| 3 |
| 9 |
| 36 |
| 9÷9 |
| 36÷9 |
| 1 |
| 4 |
| 17 |
| 68 |
| 17÷17 |
| 68÷17 |
| 1 |
| 4 |
| 9 |
| 36 |
| 9÷9 |
| 36÷9 |
| 1 |
| 4 |
| 17 |
| 51 |
| 17÷17 |
| 51÷17 |
| 1 |
| 3 |
| 80 |
| 48 |
| 80÷16 |
| 48÷16 |
| 5 |
| 3 |
| 2 |
| 3 |
| 19 |
| 38 |
| 19÷19 |
| 38÷19 |
| 1 |
| 2 |
| 12 |
| 72 |
| 12÷12 |
| 72÷12 |
| 1 |
| 6 |
| 15 |
| 20 |
| 15÷5 |
| 20÷5 |
| 3 |
| 4 |
| 18 |
| 51 |
| 18÷3 |
| 51÷3 |
| 6 |
| 17 |
| 40 |
| 90 |
| 40÷10 |
| 90÷10 |
| 4 |
| 9 |
| 45 |
| 60 |
| 45÷15 |
| 60÷15 |
| 3 |
| 4 |
点评:本题考查分数的约分.
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